Pulp beater



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PULP HEATER mwlwfm.

; UTORNEYS Sheets-Sham wth@ Filed S. MITCHELL PULP BEATER KN NN Aug. 10 l926-l Patented ',ug. l0, 1926. l

'maar ortica.

swam-Y MITCHELL, or NEW Yonx, N. Y.

,PULP snaren! application ala-April 4, i925. serial No. 20,712.

This invention relatesz proveniente 1n' pulp beating maclunes comdown and tease outthe libres of raw-steelt, such as rag, wood, straw,etc., but wlnh 1s especially effec-tive in the pulping of straw -a :fragmentary perspeetlve View of tion of the primary and similar tough raw stocks.

The invention has for itsprincipal ob-4 ject to provide a novel construction of pulp ,heating machine which is more efficient and rapid in its circulation and treatment ot the raw'stock'; which is especia-hv.adapted to treat tough iibred stoel: without likelihood of clogging; and Which`by reason of. 1ts rapid action is adapted to saye b otlrtime and power in carrying out the pulplngr op/ eration.'v With such objectsl ln-view, this 1nvention provides a novel constructionv ot pulp beating machine equipped with a 'plurality of breaker or heater rolls' set at ,dif-

ferent points in, what-may he termed, a continuous circular run trough outuh: said beater rolls comprise, essentially. a primary roll set in`one relation to the bed-plate with which it cooperates, and a secondary roll set in another relation to the' bed-plate with which it lcooperates; the primary roll being adapted to initially break up the raw stock und the secondary roll^ being;v adapted to tease out the libres ofthe initially broken' down raw stock. t The invention has for a further-object to provide means lfor assisting, the flow ol.` stock under treatment over the haekiallsA which are adjacent to the respective beater rolls.

' Other objects otthis invention, not at this time more particularlyenumerated,- will be clearly understood-trom 'the following def' tailed description of the same.

With the various. objects of this invention in View, the same consists, primarily, in the,

novel construction of pulp beater hereinafter set forth; and; the invention consists, furthermore, in the novel' arrangements and combinations ofthe various` devices and parts. as well as inthe details of the cons" struction of said'parts, all of which givill be 'hereinafter more fully described in the following specification, and then finally embodied in .the appended claims.

generally, to im-y .is fixed on itsshaft 9. l

beater roll and its fly# 'of .the secondi Similar characters of reference arer e'n1- ploy'ctlfin all ol"` the '-hereinabovedescribed views, to indicate corresponding parts.v

ltcterring now to' said drawings, the reference character (i indicates the beater tub or trough. The tuh or trough-,6 diii'ers from' the usual heater tuh orl trough in that it possenses no`1nidfeather, but consists of a continupus or endless {ring-like trough 'i' in whii'rh the 'raw materiali or stock to bepulped and the/water i'or softening the same iscirculated. U1-:urged within the 'trough 7 at one point, eo as to he mounted between the innenand outer side walls thereof, is a primary,heater roll 8, the transverse shaft i) of nhicll strurted a1nl-d1sposed hearing supports 1 0. Said primary beater roll S is driven from is journaled in suitably conu suitable source of power and hy suitable.

power transmiseion means tlnfougrha pulley 1l or .other Xtending'longitudinally of and radially ,projecting from the cylindrical surface of said-'prinmry beater roll are a pipi-ality ot .fly-bars. These {lyhars preferably comprise a sries of toothed bars 12 alternated 'witlrstraight-edged hars 13, as shown in'Figure 4 ot' the drawings# Fixed in the floor of the trough 7, so as to be` opposed to 'and beneath the primary bea-ter roll 8 isf a bedplate 14: provided with a series of upstanding stationary loe-blades Extending upwa y and 'forprovideti.

1 4, on the diswardly from' the bed-plate ucharge side of the primary beater-roll 8, is

(not shown) device which The= 'said primarybeater roll B is set in a rela- 15, or any4 othei` form of betpllate maybe 20. Said secondary beater roll 18 is also `driven from a suitable source of power by' l"any :convenient transmission means .(not

shown)y through a pulley Q1 or other device; jWhich-is'` fixed on its shaft. 19. 'Extending `iromflthe cylindrical surface' of said secondary beater rollV are a lplurality of fly- 2 `as to bars 22, preferably edges ings. j

possessingl straight as shownl in `Figure 5 of the draw- Fixed in the floor of the trough 7. soy befopposed to and beneath said secondary beater rollv18 is a bed-plate 28 prolvided with a' series of upstanding station- 'vary bed-'blades Q4, or any1` other suitable i `back-fall 26, in the manner conunon s'yrelation to thebed-plate 23 and its form of bed-plate may be provided.v Ercgtending upwardly and forwardly from said bed-plate 23, on the dischargeside oi i il secondary beater roll 18. is the apron pie 25 of a forwardly and downwardly sloping to pape r pulp-beaters. Said secondary beater roli als set in relatively close grinding or h primary and secondary beater rolls 8 and mary beater roll a substantially' semi-circular trough-way 18fand the shape andV construction ofthe? vtrough 7` is such that a substantially: seinicircular trough-Way A extends freni the back-fall. at the 8 to the-"receiving side of the secondary beater roll 18; and similarly extends from the back-fall at the discharge side-ofthe secondaryl beater roll .18 back tol the receiving side ofthe primary beater roll A .which the beaterrolls are "set Aat diametrigteninglwater, roni 'one'l beater "roll 8, thusprovidin'g, what .may `be terxnethl a 'continuous c-lrcularrun. trough oriltub, in

cally oppositevpoints'. f-S'uch novel shape and construction of trough or tub tends to'permit a rapid and continuous' circulation or the rnaterialor stock, together with the softo the other; the semi-circular:trough-ways A and Bliproyidinga natural' guiding sweep from `one .beater roll togtheotherrso that the iiuid @mass of stock and Water does not'loose headtray; ,ornmomentumf by 'reason "ot 1 comparatiase'llyrffsharp and sudden 'changes-of direcandyconsequently notonly is a more frapidrmrcrationyot the fluid mass attained, ibut likelihood; Dffrfrasseaot steeg?,l setti'iijg in at a point 18, which is mounted.-

is conveyed into the trough,

discharge side of the pri- 5 i and is circulated through further aid in attaining a rapid circulation ofthe fluid mass of stock and Water through the trough-Ways A and B, the said trough- -way A is provided with a forwardly and downwardly inclined bottom 27 extend-ing from the back-fall of the primary beater roll 8 to the secondary beater roll 18; and,

.1. in like mannei,the said trough-Away li is provided with a forwardly and downwardly inclined bottom QS'eXtending from thebrc'iifall of the secondary beater roll 18 tothe primary beater roll 8.

`Suitable cover members 29 are arranged 'over the 'primary beater roll 8 and its back- V'all, and similarly cover members .-BO' are vl-longitudi'nally :of and radially projecting lvoi the primary beater roll 8 in any suitable manner and by `any suitable means.` `illustrative'ot one manner of delivering the stock, there ie short/nin the drawings a delivjcry chute 31 by means of which the stock As above stated. the primary is spaced upwardly from the bed-plate" l. land its bed-blades 15, thus producing, what may be characterized as, a relatively coarse setting of said oic said'prirnary beaterfroll 8, This coarse setting of the priinary'beater roll" 8, together with the provision of the toothed fly-bars l, permits an initial trenit-y ineni ot' the stock, which tends to "quiciriy ,f "disintegrate the .mass thereof, and thereupon The arrangement and relation of the `sind vdischarge the saine over the adjacent backali with a minimum tendency tri-clogging at any thoroughly distributing the initially disintegrated stock through the softening wat er in circulation around the trough. T he initially disintegrated stock discharged from the primary beater roll 8 is carried. by thc circulating Water around the trough-way Al and 1between the secondary beater roll 18 andits cooperating bed-plate 23 with its bed-blades 24. is above stated, 'the secondary beater roll i8 is set irelativeiy closeA to 'the bed-plate 23' audits bed-blades 24- ilu whaty may be characterized as, a relatively line setting, and consequently as the initially l disintegrated stock passes between the secpuiped is delivered over the back-tall which is adjacent to the secondary beaterroll i8. y the trough-way li back to the' primary 'heater roll 8; .these operations bein g continued untily the stock is thoroughly and completely pulped. @wing the norei arrangement and construction Ibeater roll 8 'pointV1 while at' the saine' time liti lli

'i the. discharge side o the ,discharge 4 ondary beater niaryjbeater-'roll being disposed in relatively widely spaced relation to its cooperating latefsaid secondarl beater roll ybeing disposed inf relatively c osely spaced relation to its cooperating bed-plate, the' door ot' said trough being inclined downwardly `and orwardly'vfroin the back-fall of each beater roll to the receiving side of the opposite beater roll, said primary "beater roll aving a plurality et toothed iy-bars projecting radially from its surface, said secroll lhaving straight edged ily-bars projecting radially from its surface,

`3. A pulp beaten-comprising an endless toben pairef beater rolls occupying dialnet` -rically opposite' positions within said tub# a bed-plate beneath cach roll, a back-fall at each roll, said tub being shaped to provide a. substantially semicircular tronghway extending from the 4batik-fall ot' eachroll to the receiving side i ol the opposite roll, f Ways being' inclined romthe back-fall of 1 25 v positie roll,l and and the top,

I adapted to direct a "1f" .fi-ter, and additional .e v,means above said adiacent back-fall adaptthe floors of said trougheachirolltogthe receiving'. side of the optransvcrse water Y shower discharge means above the back-fall of each roll.

4. A pulp beater, comprising an endless tub, a pair oi" beater rolls 'occuping dla*- Irnctrically ppposite positions Within Ysaidtnb, bed-plate beneath each roll, a backall at the `discharge side ci each'rqll, said tub being shaped to provide a substantially semicircnlar troughway extending^ from tlie'back-iall of. each roll to the. receiving side4 of the opposite roll, the oors of said troughways beingl inclined from' the back- -fall of each rollte the receiving side of the opposite roll, a transverse water shower discharge means intermediate each beater roll of the adjacent back-fall shower toward the latwater shower discharge L edvtdgdirecta shower downwardly and for- ""wardlyffovar the latter.

side of each roll, said pril beater roll, said roll,V said tub being 5. A pulp beater, tub, a primary beater roll,. a secondary beater roll, said beater rolls occup ing diametrically opposite positions wit in said tub, a bed-plate beneath each beater roll, a

comprising an endless back-fall at the discharge side of each beater roll, said tub being shaped to provide a substantially semi-circular downwardly, and' forwardly inclined troughway extending from the back-fall of each beater roll to the receiving side of the opposite beater'roll, said primary beater roll bein disposed in relatively widely spaced relation to its cooperating bed-plate, said secondarybeater lroll being disposed in relatively closely spaced relation to its cooperating'bedpla'te, and transverse water shower discharge means above the backtfall of each roll.

6. A pulp beater, comprisi.ng an endless tub, a primary beater' roll, a secondary l beater rolls occup .ing :diametrically opposite positions witliin said tub, a bed-,plate beneath each beater roll, a back-fall at the discharge side of each beater shaped to provide a substantially semi-circular downwardlyv and forwardly inclined troughway extending from the back-fall of yeach beater roll to the receiving side of the opposite beaten roll, said primary beater roll being disposed in relatively widely spaced relation 'to its cooperating bed-plate, said secondary beater roll being disposed inA relativcl 'closely spaced relation to its coperating ed'-plate,

"a transverse water shower discharge means SIDNEY MITCHELL. 

